Set command

When eDRX parameters are changed using the +CEDRXS command, the PTW value is set as default. The default values can vary between different modem firmware releases. If the application needs to use a certain value, it must be set. If other than the default PTW has to be used, the %XPTW command shall be sent after the +CEDRXS command.

Syntax:

%XPTW=<AcT-type>[,<Requested_ptw_value>]

The set command parameters and their defined values are the following:

<AcT-type>

4 – Evolved Terrestrial Radio Access Network (E-UTRAN) (WB-S1 mode)

5 – E-UTRAN (NB-S1 mode)

<Requested_ptw_value>

String. Half a byte in 4-bit format. The PTW value refers to bits from 8 to 5 of octet 3 of the eDRX parameters information element (see 3GPP TS 24.008, subclause 10.5.5.32). Optional. If not present, the value of the requested AcT-type is reset to the manufacturer-specific default.

LTE-M mode

Bit

4 3 2 1 – PTW length

0 0 0 0 – 1.28 seconds

0 0 0 1 – 2.56 seconds

0 0 1 0 – 3.84 seconds

0 0 1 1 – 5.12 seconds

0 1 0 0 – 6.4 seconds

0 1 0 1 – 7.68 seconds

0 1 1 0 – 8.96 seconds

0 1 1 1 – 10.24 seconds

1 0 0 0 – 11.52 seconds

1 0 0 1 – 12.8 seconds

1 0 1 0 – 14.08 seconds

1 0 1 1 – 15.36 seconds

1 1 0 0 – 16.64 seconds

1 1 0 1 – 17.92 seconds

1 1 1 0 – 19.20 seconds

1 1 1 1 – 20.48 seconds

Narrowband Internet of Things (NB-IoT) mode

Bit

4 3 2 1 – PTW length

0 0 0 0 – 2.56 seconds

0 0 0 1 – 5.12 seconds

0 0 1 0 – 7.68 seconds

0 0 1 1 – 10.24 seconds

0 1 0 0 – 12.8 seconds

0 1 0 1 – 15.36 seconds

0 1 1 0 – 17.92 seconds

0 1 1 1 – 20.48 seconds

1 0 0 0 – 23.04 seconds

1 0 0 1 – 25.6 seconds

1 0 1 0 – 28.16 seconds

1 0 1 1 – 30.72 seconds

1 1 0 0 – 33.28 seconds

1 1 0 1 – 35.84 seconds

1 1 1 0 – 38.4 seconds

1 1 1 1 – 40.96 seconds

The following command example sets the requested PTW value:

AT%XPTW=4,"1000"
OK